Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (194) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (36)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
The absolute magnitudes of RR Lyrae stars and the age of the galactic globular cluster system
Authors:
Sandage, Allan; Cacciari, Carla
Affiliation:
AA(Mount Wilson and Las Campanas Observatoires, Pasadena, CA), AB(Osservatorio Astronomico, Bologna, Italy; Space Telescope Science Institute, Baltimore, MD)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. 645-661. (ApJ Homepage)
Publication Date:
02/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Cepheid Variables, Globular Clusters, Stellar Evolution, Stellar Magnitude, Abundance, Astronomical Photometry, Color-Magnitude Diagram, Horizontal Branch Stars, Main Sequence Stars, Metallicity, Stellar Luminosity
DOI:
10.1086/168417
Bibliographic Code:
1990ApJ...350..645S

Abstract

Evidence is adduced that many calibrations of the absolute luminosities of zero-age horizontal-branch RR Lyrae stars exhibit a dependence on metallicity. The primary unsolved problem is now why the various RR Lyrae absolute magnitude calibrations yield such different slope dependencies on metallicities. The ages of the globular clusters can, nevertheless, be determined independently of the calibration of RR Lyrae absolute luminosities, by relying on the main-sequence fits to directly ascertain bolometric magnitudes.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences



More Article Retrieval Options

HELP for Article Retrieval


Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints